Easy with a chain riveting tool that press the side plate in place.
If you think old fashioned chain with a clip is hard, try a riveted master link chain, solid link a real pita that need expensive tool that can do the job. Look for Whale riveter.
Hollow rivet link so much easier. But still a side plate that must be pressed in position.
The cheap copy of DID riveting tool good for side plate.
Back in the 80's my bike lost the clip but thanks to the F side plate chain was still together. I noticed while talking with others kicking tires.